#ifndef LINE_H
#define LINE_H

#ifdef USE_SEGMENT
#include "line_impl_segment.h"
typedef LineImplSegment Line;
#elif defined(USE_XIAN)
#include "line_impl_xian.h"
typedef LineImplXian Line;
#else
#error "You must define either USE_SEGMENT or USE_XIAN"
#endif

#endif // LINE_H
